Electroluminescent paint for bicycle and spraying process thereof

Abstract

The present invention discloses an electro-optical paint for bicycles and its spraying process, specifically relating to the field of paint technology. The electro-optical paint comprises a backing paint, a dielectric paint, a luminous paint, and a transparent conductive paint, each of which is sprayed in four layers. By controlling the construction conditions, the present invention achieves a uniform paint film with an appropriate thickness, thereby achieving uniform luminescence and bright light effects on the paint surface. The present invention achieves autonomous luminescence through the coating, providing a better warning effect for the vehicle body than reflectors or flashing lights, while effectively reducing the vehicle body weight while achieving the same effect, making it safer and more environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of paints, and in particular to an electro-optical paint for bicycles and a spraying process thereof. Background Art

[0002] Bicycles are not only a low-carbon and environmentally friendly means of transportation, but also an excellent piece of exercise equipment. With the development of modern society and the gradual realization of smart cities, outdoor cycling has become popular in cities, and more and more people are riding bicycles for exercise. However, existing bicycles are extremely dangerous when riding on unlit roads at night. In such situations, accidents between motor vehicles and bicycles are common, posing a significant safety hazard. Therefore, many bicycles are equipped with bicycle lights for illumination and warning purposes. Some designers have also added luminous handlebar covers to further enhance bicycle identification at night, alerting passing vehicles to safety.

[0003] Chinese patent CN202703768U discloses an LED light-emitting handlebar system structure including a handlebar cover, a handlebar cover hole, a handlebar cover head, a battery, an LED light point, a bicycle handlebar, and a cover plate. The handlebar cover has a certain thickness and is hollow inside. The handlebar cover hole is an opening on the surface of the handlebar cover and is a structure of the handlebar cover for light transmission. The handlebar cover head is made of the same material as the handlebar cover and is screwed onto one end of the handlebar cover in a rotating manner to cover one end of the handlebar cover. It also has a switch function. When the handlebar cover head is rotated clockwise, the power is turned on and the LED light point is illuminated. When the handlebar cover head is rotated counterclockwise, the power is turned off and the LED light point is not illuminated. This can effectively make the bicycle handlebars illuminate, which is used to remind passing vehicles to pay attention to safety. However, this solution has certain design shortcomings and is very limited in use. For example, the LED light body of the luminous handlebar cover is arranged on the outer surface of the handlebar. When riding, the rider needs to hold the bicycle handlebar tightly with his hands. At this time, the rider's hands will block the light body arranged on the outer surface of the handlebar, affecting the normal illumination of the light body. On the other hand, if the light body is arranged on the surface of the handlebar, it will also affect the rider's feel for controlling the handlebar, because the handlebar needs to be provided with a certain texture to increase friction, so that the rider can better control the direction of the handlebar and prevent it from slipping. Summary of the Invention

[0004] To this end, the present invention provides an electro-optical paint for bicycles and a spraying process thereof, so as to solve the problem that the existing bicycles are dangerous when riding without lights in the dark.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] According to one aspect of the present invention, a spraying process for electro-optical paint for bicycles is provided, the process comprising:

[0007] Step 1: First backplane layer

[0008] After mixing the backboard paint and the thinner in proportion, filtering to obtain the backboard spray liquid; after arranging the positive and negative pole circuits, spraying the backboard spray liquid at low pressure, and baking to obtain the backboard layer;

[0009] Step 2: Second dielectric layer

[0010] Shield the negative and positive interfaces of the circuit (usually use masking paper to shield the negative and positive interfaces of the circuit), stir the dielectric paint evenly, spray it with medium pressure, and bake it to obtain the dielectric layer;

[0011] Step 3: The third luminescent layer

[0012] The luminous paint is stirred evenly, sprayed at low pressure, and baked to obtain a luminous layer;

[0013] Step 4: The fourth transparent conductive layer

[0014] After the transparent conductive paint and the diluent are mixed in proportion, they are filtered to obtain a transparent conductive spray liquid. The circuit wires are connected, preheated, and high-pressure sprayed; preheated again, medium-pressure sprayed, and baked to obtain a transparent conductive layer.

[0015] Furthermore, in step 1, the diluent is selected from one or more of ethanol, isopropyl alcohol, propylene glycol ether, propylene glycol monoethylene glycol ether, butyl acetate, tert-butyl acetate, acetone, methyl amyl ketone, and aliphatic hydrocarbons.

[0016] In this step, the diluent is preferably ethanol, with a ratio of 1:(0.2-0.8), more preferably 1:0.5;

[0017] Furthermore, in the step 1, the low pressure condition is 0.2-0.3 MPa, and the spraying distance is close distance spraying, preferably 9-11 cm, more preferably 10 cm.

[0018] Furthermore, in step 1, the baking conditions are 65-95° C. and 15-30 minutes.

[0019] In the present invention, the resistance between the positive and negative electrodes of the luminescent material is normally within 10Ω, and the positive and negative electrode circuits are arranged with masking paper.

[0020] Furthermore, in the step 2, the medium pressure condition is 0.5-0.6 MPa.

[0021] Usually in this step, medium pressure spraying is used, with each spraying pass taking 1-2 minutes, and 3-4 spraying passes are performed; the film thickness is above 20 μm.

[0022] Furthermore, in the step 2, the baking conditions are 65-95° C. and 10-20 minutes.

[0023] Furthermore, in step 3, the low pressure condition is 0.3-0.4 MPa. In this step, low pressure spraying is usually performed for 2-3 times, and the uniformity is observed under a UV lamp.

[0024] Meanwhile, in this step, the baking conditions are 65-95° C. for 10-20 minutes.

[0025] Furthermore, in step 4, the high pressure condition is 0.7-0.8 MPa. In this step, high pressure long distance spraying is performed 1-2 times, and the long distance generally refers to more than 25 cm, preferably 30 cm.

[0026] In this step, the diluent is selected in the same manner as in step 1, preferably ethanol, in a ratio of 1:(2-5); more preferably 1:3.

[0027] In this step, preheat the workpiece to 30-40°C; and then heat the workpiece to 30-40°C again.

[0028] In this step, the medium pressure condition is 0.5-0.7 MPa, and the baking condition is 65-95° C. for 5-10 minutes.

[0029] According to another aspect of the present invention, an electro-optical paint for bicycles is provided, wherein the electro-optical paint comprises a backboard paint, a medium paint, a luminous paint and a transparent conductive paint.

[0030] Furthermore, the active ingredients of the backplane paint are copper and silver, and the ratio is not particularly limited, preferably (1-5):1, which has the best effect; the active ingredient of the dielectric paint is barium titanate (accounting for 10-30%); the active ingredient of the luminous paint is ZnS:Cu (CAS-No.: 1314-98-3); the active ingredient of the transparent conductive paint is polythiophene (CAS-No.: 155090-83-8), which is a conductive polymer.

[0031] The present invention has the following advantages:

[0032] The invention uses a specific coating and construction process to form a circuit in the coating of the prepared workpiece, which can stimulate the luminescent layer therein to achieve the effect of autonomous luminescence when powered.

[0033] By controlling construction conditions, the present invention achieves a uniform, optimally thick paint film, resulting in a uniform, brightly lit surface. The coating's self-luminous properties provide a superior warning effect compared to reflectors or flashing lights, while also significantly reducing vehicle weight and enhancing safety and environmental friendliness.

[0034] The electric light paint for bicycles provided by the present invention can prevent bicycles from being ignored by motor vehicles due to lack of light sources on roads without street lights at night, thereby improving the safety of bicycles traveling at night. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0036] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0037] Figure 1 This is an enlarged view of the gear-engine connection of a bicycle after painting provided by Example 4 of the present invention;

[0038] Figure 2 A circuit diagram of a bicycle provided in Example 4 of the present invention after painting without installing a battery;

[0039] Figure 3 A circuit diagram of a bicycle provided in Example 5 of the present invention, wherein the bicycle is painted but no battery is installed;

[0040] In the figure: 1- generator; 2- battery; 3- gear. DETAILED DESCRIPTION

[0041] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0042] The electro-optical paint of the present invention is made to have four coating combinations:

[0043] The first layer is the backplane layer, which is sprayed directly onto the surface of the object to play a conductive role; the backplane is a highly conductive, low-resistance material.

[0044] The second layer is the dielectric layer, which acts as an insulator, prevents short circuits, and ensures that the current is evenly distributed on the surface so that the light is evenly distributed.

[0045] The third is the luminescent layer, which is used to determine the color of the light.

[0046] The fourth layer is a transparent conductive layer. The function of this layer is to connect the positive and negative electrodes and generate an electric field effect between the electrodes to stimulate the light-emitting layer to emit light.

[0047] Example 1

[0048] This embodiment provides a spraying process for electro-optical paint for bicycles:

[0049] Step 1: First backplane layer

[0050] After mixing backboard paint (copper:silver = 1:1) and ethanol = 1:0.5 evenly, filter through a 200-mesh screen and use masking paper to weave the positive and negative pole circuits on the bicycle frame;

[0051] The spray gun diameter is about 1.3mm, and low-pressure close-range spraying is used (process requirements: distance 10cm, air pressure 0.2MPa);

[0052] Baking conditions: 65°C, 15 minutes (process requirements: the resistance between the positive and negative electrodes is normally within 10Ω).

[0053] In this step, if the distance is increased, it is easy to cause particles in the paint layer if the distance is too far; the thickness of the spray will be too thick if the distance is too close, and it is easy to cause uneven paint layer if the distance is too close;

[0054] This step uses low pressure, and has screened and tested medium pressure. Medium pressure spraying will cause particles to appear in the paint layer.

[0055] Step 2: Second dielectric layer

[0056] Use masking paper to shield the negative and positive interfaces of the circuit, stir the dielectric paint (barium titanate accounts for 10%) and spray it directly, use medium pressure spraying, and spray 3 times with an interval of 2 minutes between each spraying (process requirements: 0.5MPa, film thickness of more than 20μm);

[0057] Baking conditions: 65°C, 20 minutes.

[0058] In this step, medium-pressure spraying is used. However, if low-pressure spraying is used, the spraying will be uneven and short circuits will easily occur. High-pressure spraying will not reach the expected thickness and the current will not pass evenly.

[0059] Step 3: The third luminescent layer

[0060] After the luminous paint is evenly stirred, spray it directly at low pressure for 3 times (process requirements: air pressure 0.3MPa), and let it stand for 5 minutes;

[0061] Baking conditions: 65°C, 20 minutes;

[0062] This step uses low pressure, and the medium pressure has been screened and tested. Too high an air pressure may blow the paint layer during the spraying process, resulting in unevenness.

[0063] Step 4: The fourth transparent conductive layer

[0064] After the transparent conductive paint and ethanol are mixed evenly in a ratio of 1:3, filter through a 200-mesh mesh, remove the masking paper, and make the connection port with copper sheet. Preheat the workpiece to 40°C.

[0065] High-pressure long-distance spraying 2 times (process requirements: distance 30cm, air pressure 0.7MPa);

[0066] Reheat the workpiece to 30-40°C; preheating is to enhance the adhesion strength of the paint layer;

[0067] Medium pressure spraying (process requirements: air pressure 0.6MPa);

[0068] Baking conditions: 65°C, 10 minutes.

[0069] This step requires adjusting the pressure. The purpose of applying high-pressure spray twice is to enhance the adhesion strength of the paint layer. If the pressure is too low, the adhesion is insufficient and the paint layer may fall off. The purpose of switching to medium-pressure spraying is to ensure the thickness of the paint layer. The pressure should not be too low or too high. Too low will cause sagging and uneven paint layer. Too high will make it difficult to meet the required paint layer thickness and easily blow the paint layer, resulting in unevenness.

[0070] Example 2

[0071] This embodiment provides a spraying process for electro-optical paint for bicycles:

[0072] Step 1: First backplane layer

[0073] After mixing backboard paint (copper:silver=3:1) and ethanol=1:0.2 evenly, filter through a 200-mesh screen and use masking paper to weave the positive and negative pole circuits on the bicycle frame;

[0074] The spray gun diameter is about 1.3mm, and low-pressure close-range spraying is used (process requirements: distance 10cm, air pressure 0.25MPa);

[0075] Baking conditions: 80℃, 12 minutes (process requirements: the resistance between the positive and negative electrodes is normally within 10Ω).

[0076] Step 2: Second dielectric layer

[0077] Use masking paper to shield the negative and positive interfaces of the circuit, stir the dielectric paint (barium titanate accounts for 20%) and spray it directly, use medium pressure spraying, and spray 4 times with an interval of 1 minute between each spraying (process requirements: 0.6MPa, film thickness of more than 20μm);

[0078] Baking conditions: 80℃, 15 minutes.

[0079] Step 3: The third luminescent layer

[0080] After the luminous paint is stirred evenly, spray it directly at low pressure, spray it twice (process requirements: air pressure 0.4MPa), and let it stand for 5 minutes;

[0081] Baking conditions: 80°C, 15 minutes;

[0082] Step 4: The fourth transparent conductive layer

[0083] After the transparent conductive paint and ethanol are mixed in a ratio of 1:2, filter through a 200-mesh mesh, remove the masking paper, and make the connection port with copper sheet. Preheat the workpiece to 30°C.

[0084] High-pressure long-distance spraying 2 times (process requirements: distance 30cm, air pressure 0.8MPa);

[0085] Reheat the workpiece to 30-40°C;

[0086] Medium pressure spraying (process requirements: air pressure 0.5MPa);

[0087] Baking conditions: 80°C, 7 minutes.

[0088] Example 3

[0089] This embodiment provides a spraying process for electro-optical paint for bicycles:

[0090] Step 1: First backplane layer

[0091] After mixing backboard paint (copper:silver = 5:1) and ethanol = 1:0.5, filter through a 200-mesh screen and use masking paper to draw a positive and negative circuit on the bicycle frame;

[0092] The spray gun diameter is about 1.3mm, and low-pressure close-range spraying is used (process requirements: distance 10cm, air pressure 0.3MPa);

[0093] Baking conditions: 95°C, 10 minutes (process requirements: the resistance between the positive and negative electrodes is normally within 10Ω).

[0094] Step 2: Second dielectric layer

[0095] Use masking paper to shield the negative and positive interfaces of the circuit, stir the dielectric paint (30% barium titanate) evenly and spray it directly, use medium pressure spraying, and spray 4 times with an interval of 1 minute between each spraying (process requirements: 0.6MPa, film thickness of more than 20μm);

[0096] Baking conditions: 95°C, 10 minutes.

[0097] Step 3: The third luminescent layer

[0098] After the luminous paint is stirred evenly, spray it directly at low pressure, spray it twice (process requirements: air pressure 0.4MPa), and let it stand for 5 minutes;

[0099] Baking conditions: 95°C, 10 minutes;

[0100] Step 4: The fourth transparent conductive layer

[0101] After the transparent conductive paint and ethanol are mixed in a ratio of 1:5, filter through a 200-mesh mesh, remove the masking paper, and make the connection port with copper sheet. Preheat the workpiece to 30°C.

[0102] High-pressure long-distance spraying 2 times (process requirements: distance 30cm, air pressure 0.8MPa);

[0103] Reheat the workpiece to 30-40°C;

[0104] Medium pressure spraying (process requirements: air pressure 0.7MPa);

[0105] Baking conditions: 95°C, 5 minutes.

[0106] Example 4

[0107] This embodiment provides a circuit using a bicycle painted in Example 1 without installing a battery, such as Figure 2 As shown:

[0108] The generator 1 is connected to the bicycle wheel gear 3, and the bicycle wheel rotates and drives the coaxial fixed gear 3 to rotate (such as Figure 1 As shown), the gear 3 is connected to the input shaft of the generator 1. The generator 1 converts the kinetic energy of the rotation of the gear 3 into electrical energy and stores it in the battery 2. When the switch K connecting the battery 2 and the luminescent material copper sheet is turned on, the wheel rotates to make the part of the bicycle coated with the luminescent material glow.

[0109] Example 5

[0110] This embodiment provides a circuit for a bicycle painted using embodiment 1 without installing a battery and ensuring nighttime luminescence. Figure 3 As shown:

[0111] A generator is connected to the bicycle wheel's gear 3. As the bicycle wheel rotates, the coaxially fixed gear 3 rotates. Generator 1 converts kinetic energy into electrical energy, which is stored in battery 2. This activates switch K, which connects battery 2 to the copper sheet of luminescent material. The bicycle is also equipped with a photosensitive element, which is connected to a processor. The processor controls the connection and disconnection of the circuit between the battery and the luminescent material via the auxiliary contacts of a relay. The photosensitive element detects ambient light intensity and transmits this information to the processor, which compares the light intensity detected by the photosensitive element with a preset intensity value. When the light intensity detected by the photosensitive element exceeds the preset intensity value, the relay's auxiliary contacts close, which are then connected in series with switch K. As the wheel rotates, the luminescent material-coated portion of the bicycle illuminates in low or no light.

[0112] Example 6

[0113] Directly set the battery as the power supply device.

[0114] Comparative Example 1

[0115] 1. The active ingredients of the backsheet paint are copper, iron, and silver in a ratio of 1:1:1. Other ingredients are exactly the same as in Example 1, but the resistance will be significantly increased.

[0116] 2. The active ingredient of the backlight paint is copper, and the rest is exactly the same as in Example 1; however, the electrical conductivity of copper alone is too poor to meet the requirements;

[0117] 3. The active ingredient of the backlight paint is silver, and the rest is exactly the same as in Example 1; however, silver alone is expensive;

[0118] 4. The active ingredients of the backboard paint are copper, aluminum and silver in a ratio of 1:1:1. Other aspects are exactly the same as in Example 1. This will significantly increase the resistance.

[0119] It can be seen that the resistance of copper or silver alone is not much different, but adding other components will increase the resistance. However, copper alone has poor conductivity and silver alone is expensive, so a mixture of copper and silver is better, preferably (1-5):1.

[0120] Comparative Example 2

[0121] The medium paint is a mixture of titanium dioxide and zinc oxide in a ratio of 1:1, and the other components are exactly the same as those in Example 1.

[0122] Comparative Example 3

[0123] The transparent conductive paint is made of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) and copper powder mixed in a ratio of 2:8. Other components are exactly the same as those in Example 1.

[0124] Experimental Example 1

[0125] The performance of the electro-optical paint for bicycles of Examples 1-3 and Comparative Examples 2-3 was evaluated, and the indicators are shown in Table 1.

[0126] According to the GBT 9286-2021 cross-cut test, the paint layer's resistance to peeling is assessed, reflecting the paint layer's adhesion.

[0127] The luminance meter was used to test and evaluate the luminous performance of the product. The durability of the product was evaluated based on the difference in light intensity before and after 100 hours of power supply at 100V and 400Hz. The results are shown in Table 1.

[0128] Table 1

[0129]

[0130]

[0131] It can be seen from Table 1 that the electro-optical paint provided by the present invention has higher bonding performance, better adhesion, can provide higher light intensity, and has a longer service life.

[0132] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A spraying process for electro-optical paint for bicycles, characterized in that: The process comprises: Step 1: First backplane layer After mixing the backboard paint and thinner in proportion, filter and obtain the backboard spray liquid; after arranging the positive and negative pole circuits, spray the backboard spray liquid at low pressure and bake to obtain the backboard layer; the low pressure condition is 0.2~0.3MPa; the resistance between the positive and negative poles is normally within 10Ω; Step 2: Second dielectric layer Shield the negative and positive interfaces of the circuit, stir the dielectric paint evenly, spray it at medium pressure, and bake it to obtain the dielectric layer; the medium pressure condition is 0.5~0.6MPa; Step 3: The third luminescent layer The luminous paint is stirred evenly and then sprayed at low pressure and baked to obtain a luminous layer; the low pressure condition is 0.3~0.4MPa; Step 4: The fourth transparent conductive layer After the transparent conductive paint and the diluent are mixed in proportion, they are filtered to obtain a transparent conductive spray liquid. The circuit wires are connected, preheated, and high-pressure spraying is performed. After that, preheated again, medium-pressure spraying is performed, and baking is performed to obtain a transparent conductive layer. The high-pressure condition is 0.7-0.8MPa; the medium-pressure condition is 0.5-0.7MPa; the medium-pressure pressure is less than the high-pressure pressure. The active ingredients of the backboard paint are copper and silver in a ratio of (1-5):1; the active ingredient of the dielectric paint is 10-30% barium titanate; the active ingredient of the luminous paint is ZnS:Cu; and the active ingredient of the transparent conductive paint is polythiophene.

2. The spraying process of the electro-optical paint for bicycle according to claim 1, characterized in that: In the step 1, the diluent is selected from one or more of ethanol, isopropyl alcohol, propylene glycol ether, propylene glycol monoethylene glycol ether, butyl acetate, tert-butyl acetate, acetone, methyl amyl ketone, and aliphatic hydrocarbons.

3. The spraying process of the electro-optical paint for bicycle according to claim 1, characterized in that: In the step 1, the baking condition is 65-95° C. for 15-30 minutes.

4. The spraying process of the electro-optical paint for bicycle according to claim 1, characterized in that: In the step 2, the baking condition is 65-95° C. for 10-20 minutes.

5. An electro-optical paint for bicycles, characterized in that: The electro-optical paint for bicycles is prepared by the spraying process of any one of claims 1 to 4, and the electro-optical paint comprises a backboard paint, a dielectric paint, a luminous paint and a transparent conductive paint; the active ingredients of the backboard paint are copper and silver; the active ingredient of the dielectric paint is barium titanate; the active ingredient of the luminous paint is ZnS:Cu; and the active ingredient of the transparent conductive paint is polythiophene.

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